The phpinfo command gives information on your php environment and is used to check the configuration (php.ini) of a php cli
php -i gives you phpinfo information at the command line.
php -i
You can overwrite/define them with the -d option.
Example:
/usr/bin/php7.4 -dxdebug.client_host=127.0.0.1 -i | grep debug.client_host
Create a page phpinfo.php with the following code and get it from your webserver
<?php phpinfo(); ?>